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Incremental hydraulic jaw opener for MR imaging of the temporomandibular joint

✍ Scribed by Thomas J. Vogl; Dieter Eberhard; Clifford Bergman; Josef Lissner

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
406 KB
Volume
2
Category
Article
ISSN
1053-1807

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✦ Synopsis

Abstract

Magnetic resonance (MR) imaging in the open‐and closed‐mouth positions is the method of choice for visualizing the temporomandibular joint (TMJ). To analyze the TMJ in response to various degrees of mouth opening, the authors constructed a hydraulic incremental jaw opener. This apparatus enables obtaining of reproducible and stable positions of TMJ articulation. With modified gradient pulse sequences, the technique yields good spatial resolution of joint anatomy, including that of the articular disk. The application of a cine program allows cinematographic display of TMJ motion, which in conjunction with static open‐and closed‐mouth views can be useful in the diagnosis of TMJ dysfunction. The authors used the incremental jaw opener to examine the disk‐condyie complex at each open‐mouth position, with particular attention to extreme open‐mouth positions.

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